Engines and their compression.

[tomcat&family]

After reading several posts on this forum about compression, I am wondering about something. In another thread, someone mentioned that their engine had 140psi on one cylinder and 130 on the other. What would make their engine have that compression with only 35 hours on it? The engine in one of our GTX RFI's that I tested yesterday had 150psi on both cylinders, and that engine has 170+ hours on it. It hasn't ever been rebuilt, either. So what makes these differences in compression occur?

Thanks,


-Tom and Family

 

[robin savell lloyd]

friction [heat] and some times poor parts :cheers:

 

[seadoosnipe]

Testing procedures....?

And lots of times, it's the procedures and equipment that they are using that causes them to come up with faulty results.......:cheers:

 

[tomcat&family]

Okay, thank you.

What would cause two cylinders on the same engine to have different compression readings?